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google solidworks gear models, I'm sure you'll find something, then scale it

I only need 2D, the 3D looks complicated and I don't think I can get it. cheers Mick

Can you inport XY co ordinates straight into a model. Example - straight from surveying equipment (CVS data ). Join up all the points and produce a model of the ground area. Cheers Mick

Thanks, very interesting

Can anyone point me to the joint design of the old (British) gasometer. The telescopic type that rose or fell with gas content. Where they some sort of water trough. Has anyone any sectional pictures. Cheers Mick

sounds like a chain sprocket type drive?

CP=Mn x PI = 2.3565 email me for a geometry program mikebull@blueyonder.co.uk

I think each pitch is a complete circle. They are then pressed apart & welded up. google Srew feeder/auger etc.

Thanks Guys, excellent reponses & theory's. I do hate it when one line answers come back in forums like "go to first pinciples or Hire a vessel engineer etc." where you don't get the expertise of the engineers. Thanks again.

So it could be said then that as long as the tangential shear stress q is less than the 0.06 x E x t / r formulae. (or .8f), and all the other calculated stresses are below their allowables it won't buckle. I'm not designing this and I'm not a structural eng so please excuse my ignorance.

That's what I thought Cheers

Another one on Horizontal tanks. Most have 2 supoorts (best for everything) but is there a rule of thumb for when to add a central one to avoid buckling. ie if L/D gets over a certain figure?

Spurs, did you get my program?

email me mikebull@blueyonder.co.uk

Cheers Mick

Being a nosey mechanical engineer I was wondering what calculated pressure is used for a round horizontal atmospheric tank. I know pressure varies with depth, so on a vertical one the pressure is the same all round the tank depending on depth. For the horizontal one you would have "zero" at the...

Noise? - are they correctly meshing. Do they feel smooth when you turn by hand? Try wiping dry & putting some bluing compound on the teeth. See if they are meshing over the full tooth.

Thanks, I was expecting it in metres.

Just for interest. Has anyone calculated the max length of steel stairs with std 180 x 75 PFC stringers (around 40 degs slope) simply supported at the ends?

Thanks Guys